Is it the same engine? that might help...if it is, that's not too hard, snap a few pics and start disconnecting things from the engine to remove it. Once you start taking apart the old one you'll see how it goes together, the new one drops right in and re-connects the same way. I've done a few, and seemingly daunting, once you start in it comes out pretty quick. When the replacement is bolted in, you've got all kinds of stuff hanging there to re-attach and everything generally only goes to one place, its all bent and routed to the right spot just reconnect.